Mailchimp for WooCommerce < 6.3 - Unauthenticated Customer Email and Cart Disclosure via IDOR

The Mailchimp for WooCommerce WordPress plugin before 6.3 does not require authentication or verify ownership before loading a saved cart from a request-supplied identifier that is derived from a customer's email address, allowing an unauthenticated attacker who knows a customer's email address to confirm that the customer shops at the store and to read that customer's saved cart contents.

Problem type

CWE-639 Authorization Bypass Through User-Controlled Key

Affected products

Unknown

Mailchimp for WooCommerce

< 6.3 - AFFECTED

References

wpscan.com

https://wpscan.com/vulnerability/f4d7b94a-7699-464c-a646-5946837b363a/

exploitvdb-entrytechnical-description

JSON source

https://cveawg.mitre.org/api/cve/CVE-2026-92436

Click to expand

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-92436",
    "assignerOrgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81",
    "assignerShortName": "WPScan",
    "dateUpdated": "2026-09-27T06:00:21.636Z",
    "dateReserved": "2026-09-16T10:16:35.087Z",
    "datePublished": "2026-09-27T06:00:21.636Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81",
        "shortName": "WPScan",
        "dateUpdated": "2026-09-27T06:00:21.636Z"
      },
      "title": "Mailchimp for WooCommerce < 6.3 - Unauthenticated Customer Email and Cart Disclosure via IDOR",
      "descriptions": [
        {
          "lang": "en",
          "value": "The Mailchimp for WooCommerce WordPress plugin before 6.3 does not require authentication or verify ownership before loading a saved cart from a request-supplied identifier that is derived from a customer's email address, allowing an unauthenticated attacker who knows a customer's email address to confirm that the customer shops at the store and to read that customer's saved cart contents."
        }
      ],
      "affected": [
        {
          "vendor": "Unknown",
          "product": "Mailchimp for WooCommerce",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.3"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-639 Authorization Bypass Through User-Controlled Key",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://wpscan.com/vulnerability/f4d7b94a-7699-464c-a646-5946837b363a/",
          "tags": [
            "exploit",
            "vdb-entry",
            "technical-description"
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "JunHee CHO",
          "type": "finder"
        },
        {
          "lang": "en",
          "value": "WPScan",
          "type": "coordinator"
        }
      ]
    }
  }
}